Note : This story is completely

 My 18 year old sister and our next door neighbor Susy have been lez
playmates for years. Susy is a 18 year old high school student at an
all girls catholic school.

Sis has made sure that Susy remains pure until she"s 18. Sis has also kept me her virgin pure sex toy ever
since we were young teens. I"m now 20 and Sis wants me & Susy to be
her virgin pure sex slaves. Who am I to disobey my Mistress Sister?
Especially when she ties me up and tells all about what she does with
her innocent & constantly horny blonde bombshell catholic schoolgirl!
Sis has used the same strict methods of discipline she used on me to
keep Susy virgin pure and sexually satisfied. Sis promised Susy that
if she was a good girl, she would give me to her as her groom on her
18th birthday.

Susy got on her knees, promised to be her good little
servant girl and kissed my sister"s feet in gratitude. I agreed to
remain my sister"s obedient chaste love slave and joined Susy at my
sister"s feet. Susy and I smiled at each other and started to kiss.
Sis pulled me up by the hair and slapped my face. "That"s enough of
that!" she scolded. She then ordered Susy to bend over and prepare
herself for discipline.

I was then ordered to leave the room so that
Susy could be disciplined in private. "Sorry, girls only!" Sis let
me know that until she turned 18, Susy was all her"s. "Susy can be
your"s also if you obey the rules!" Sis exclaimed as she slapped my
face again & again. I kissed my sister"s hand and swore to be her
obedient slave and thanked her for letting me be Susy"s fiancee.